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Sporopollenin Surface Characterization with Inverse Liquid Chromatography
Oluwatimilehin O Fadiran1, J Carson Meredith1
1School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive, NW, Atlanta, Georgia 30032, United States.
ACS Omega
|January 1, 2026
Summary
This study used inverse liquid chromatography to analyze ragweed pollen
Area of Science:
- Analytical Chemistry
- Materials Science
- Biomaterials
Background:
- Pollen exine, composed of sporopollenin, has unique chemical resistance.
- Understanding sporopollenin's surface chemistry is key for its natural roles and material applications.
Purpose of the Study:
- To quantitatively probe sporopollenin's surface interactions with organic compounds.
- To investigate the surface chemistry of defatted and acid-base treated pollen.
Main Methods:
- Utilized inverse liquid chromatography with ragweed pollen as the stationary phase.
- Measured capacity factors of various chemical probes at different temperatures.
- Calculated heats of interaction to determine surface properties.
Main Results:
- Defatted pollen showed minimal interaction, except with small polar molecules like ethanol.
- Acid-base treated pollen exhibited strong retention of polar and protic probes (alcohols, amines).
- Enthalpies of interaction ranged from -9 to -41 kJ/mol, indicating specific surface interactions.
Conclusions:
- Acid-base treated pollen surfaces are polar and possess Lewis acid characteristics.
- Surface chemistry of sporopollenin can be modified for tailored molecular interactions.
- Inverse liquid chromatography is effective for characterizing pollen surface properties.
